Stackable unit for a retaining wall having irregular stonework



FIG. 1 is a top plan view of a stackable unit for a retaining wall having irregular stonework showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is an isometric view thereof. 

The ornamental design for a stackable unit for a retaining wall having irregular stonework, as shown. 